The Dutch AIS website allows you to file VFR flight plans as well and doesn't allow submission until everything is correct. It understands routes like COA DCT KOK DCT DVR etc, and will handle DOF/, EET/ and everything. It is sent to the amsterdam flight briefing center (I suppose), EHAMZPZW, and the acknowledgement is sent back via e-mail. EHAMZPZW, I suppose, forwards the plan to all parties involved. At least when I did put in that route and an EET/EBBU0030, Ostende knew I was coming.
It also accepted my flight plan back from EGLK to EHRD, but I don't know about UK internal flights.